CN204089203U - Based on the new type mining reactive-load compensator of modularization three-level structure - Google Patents
Based on the new type mining reactive-load compensator of modularization three-level structure Download PDFInfo
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- CN204089203U CN204089203U CN201420459778.4U CN201420459778U CN204089203U CN 204089203 U CN204089203 U CN 204089203U CN 201420459778 U CN201420459778 U CN 201420459778U CN 204089203 U CN204089203 U CN 204089203U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/10—Flexible AC transmission systems [FACTS]
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Abstract
The utility model provides a kind of new type mining reactive-load compensator based on modularization three-level structure, comprise interconnective main loop unit and control unit, main loop unit comprises the input reactance device, phase shifting transformer and the three level power conversion unit that connect successively, and control unit comprises control signal collecting unit, control algolithm realizes unit, control signal issue unit.The utility model can produce capacitive reactive power neatly, also can produce perception idle, capacitive reactive power to perceptual idle, otherwise or, can fast tunable continuously.
Description
Technical field
The utility model relates to a kind of compensator, particularly, relates to a kind of new type mining reactive-load compensator based on modularization three-level structure.
Background technology
Main electric power load in Coal Mine Power Network is asynchronous motor load, and these inductive loads can consume a large amount of reactive powers.For the voltge surge avoiding these asynchronous machines to start, some motor have employed variable frequency starting or transmission mode, but the harmonics restraint of system and reactive power compensation remain the main consideration content of power system in mines.Reactive power impact can cause voltage ripple of power network, and harmonic wave can cause and grid supply quality is worsened.Harmonic wave causes the heating of the electromechanical equipments such as motor or burns, can cause supply line, power consumption equipment insulation decline and aging, easily cause the faults such as electric leakage, short circuit.Therefore, adopt method effectively to carry out harmonics restraint and the reactive power comprehensive regulation to be even more important to mine safety production and energy saving of system thereof, raising equipment operational reliability.
Conventional dead reactive power compensator (Static Var Compensator, SVC) refers to the static reacance energy generation device be connected in parallel or reactive power absorption device that export and change with the specific controling parameters of electric power system.It mainly relies on the power electronic device such as thyristor to complete implementation adjustment to energy-storage travelling wave tube (electric capacity or reactance) or switching.This pattern is in fact the mode changing reactance, and this SVC pattern is variable reactance pattern.As TCR pattern, the perception that can only change system is idle, cannot realize capacitive reactive power to perceptual idle continuously adjustabe.Owing to adopting thyristor device, there is the situation can only opened, can not turn off, and the SVC of this pattern produces a certain amount of harmonic wave.
Utility model content
For defect of the prior art, the purpose of this utility model is to provide a kind of new type mining reactive-load compensator based on modularization three-level structure, it can produce capacitive reactive power neatly, also perception can be produced idle, capacitive reactive power is idle to perception, otherwise or, can fast tunable continuously, be a kind of novel mining reactive-load compensator, have important application value to mine particular electrical netting gear.
According to an aspect of the present utility model, a kind of new type mining reactive-load compensator based on modularization three-level structure is provided, it is characterized in that, comprise interconnective main loop unit and control unit, main loop unit comprises the input reactance device, phase shifting transformer and the three level power conversion unit that connect successively, and control unit comprises control signal collecting unit, control algolithm realizes unit, control signal issue unit.
Preferably, described three level power conversion unit is made up of insulated gate bipolar transistor.
Preferably, described three level power conversion unit is made up of insulated gate bipolar transistor and capacitor.
Preferably, described control signal collecting unit is made up of interconnective voltage sensor and current sensor.
Preferably, described voltage sensor adopts the AV100-2000 voltage sensor that LEM company produces; The LT508-S6 type current sensor that described current sensor adopts LEM company to produce.
Preferably, described control algolithm realizes unit is digital signal processor.
Preferably, described digital signal processor adopts the TMS320F28335 cake core that Texas Instruments produces.
Preferably, described control signal issue unit is field programmable gate array chip.
Preferably, described field programmable gate array chip adopts the ProASIC3A3P250 cake core that Ai Te company produces.
Compared with prior art, the utility model has following beneficial effect: the utility model can produce capacitive reactive power neatly by the amplitude and phase place controlling three level power conversion unit output voltage, also perception can be produced idle, capacitive reactive power is idle to perception, otherwise or, can fast tunable continuously, and the function of active power filtering can be realized, be a kind of novel mining reactive-load compensator, have important application value to mine particular electrical netting gear.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:
Fig. 1 is the structural representation of the utility model based on the new type mining reactive-load compensator of modularization three-level structure.
Fig. 2 is the schematic diagram of the phase shifting transformer electrical structure in the utility model.
Fig. 3 is the schematic diagram of the three level power conversion unit electrical structure in the utility model.
Fig. 4 is the schematic diagram that the utility model sends capacitive reactive power experimental waveform.
Fig. 5 is the schematic diagram that the utility model sends perceptual idle experimental waveform.
Fig. 6 is that the utility model is switched to from sending capacitive reactive power the schematic diagram sending perceptual idle dynamic experimental waveform.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.Following examples will contribute to those skilled in the art and understand the utility model further, but not limit the utility model in any form.It should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, some distortion and improvement can also be made.These all belong to protection range of the present utility model.
As shown in Figure 1, the utility model comprises interconnective main loop unit 1 and control unit 2 based on the new type mining reactive-load compensator of modularization three-level structure, adopt the idle detection mode based on instantaneous reactive power theory, to net side power factor for control objectives, dynamic tracking electrical network quality of power supply change, and regulating idle output according to situation of change, the high-quality realizing electrical network runs; Main loop unit 1 comprises the input reactance device 3, phase shifting transformer 4 and the three level power conversion unit 5 that connect successively; Control unit 2 comprises control signal collecting unit 6, control algolithm realizes unit 7, control signal issue unit 8.Control unit 2 realizes the full-digital control of reactive-load compensator by digital signal processor (DSP) and field programmable gate array (FPGA) chip, adopt voltage, current digital closed loop and PWM (Pulse-Width Modulation) modulation technique, control signal adopts Optical Fiber Transmission, achieve high-low pressure isolation, improve stability and the reliability of reactive-load compensator.The TMS320F28335 cake core that described digital signal processor (DSP) adopts Texas Instruments to produce; The ProASIC3A3P250 cake core that described field programmable gate array (FPGA) chip adopts Ai Te company to produce.
Described input reactance device 3 causes current break and instability on the impact of reactive-load compensator when suppressing electrical network unstable; protection reactive-load compensator; extend its useful life and prevent humorous wave interference; power factor and the harmonic inhabitation electric current of reactive-load compensator can be improved simultaneously; filtering harmonic voltage and harmonic current, improve power grid quality.
The SVL-0350-EISC-2680 type three-phase reactor that described input reactance device adopts Shanghai Eagtop Electronic Technology Co., Ltd. to produce, its inductance ratings is 0.6mH.
As shown in Figure 2, described phase shifting transformer 4 is dry-type transformer, adopts multiplex design to reach the object reducing input harmonics.Transformer primary side winding switching input reactance device, secondary has two secondary winding, adopt Δ/Δ (Dd0) and Δ/Y (Dy11) connection respectively, make secondary side output voltage phase shift 30 degree, each three level power conversion unit is powered by one group of secondary of transformer respectively, mutually insulated between three level power conversion unit 5 and between transformer secondary.Phase shifting transformer 4 makes each three level power conversion unit 5 separate by electrical isolation effect thus realizes voltage superposition series connection, the connection of phase shift simultaneously can eliminate ten once following harmonic waves effectively, input current waveform is close to sinusoidal wave, and total harmonic current distortions rate can lower than 5%.
As shown in Figure 3, described three level power conversion unit 5 to be made up of with capacitor insulated gate bipolar transistor (IGBT) and to be connected with phase shifting transformer 4, its topology is succinct, dependable performance, auxiliary with low capacity energy-storage travelling wave tube, reactive-load compensator output line voltage is made up of five level, improves the withstand voltage of system, makes system configuration be easy to expansion.Compared to traditional two level block, it has, and power system capacity is higher, output waveform harmonic content is less, can avoid along with electric pressure raises, the various problems that the large du/dt that traditional two level block bring causes.
Described control signal collecting unit 6 is made up of interconnective voltage sensor and current sensor.Voltage sensor is used for real-time detection of grid voltage, capacitive side voltage; Current sensor is used for detecting load current and reactive-load compensator output current in real time.Line voltage and load current are for calculating the reactive power of electrical network, and capacitive side voltage is used for realizing DC bus capacitor neutral-point-potential balance control, and reactive-load compensator output current is used for the closed-loop control of reactive-load compensator control system.
Described control algolithm realizes unit 7 for digital signal processor (DSP).The control algolithm of reactive-load compensator realizes in digital signal processor (DSP), and sensor signal is input in digital signal processor (DSP) by A/D conversion carries out s operation control.Control algolithm unit completes top layer algorithm, the protection of system, the functions such as the control of submodule and protection.Control algolithm unit, after receiving the capacitance voltage of line voltage, electric current and each bottom floor units, current signal, calculates the set-point of reactive-load compensator, then control signal is sent to control signal issue unit.
Described control signal issue unit 8 is field programmable gate array (FPGA) chip.Field programmable gate array (FPGA) chip obtains the modulation signal of PWM waveform from digital signal processor (DSP), then produces with triangle wave PWM waveform controls three level power cell again switching device through driver module.Field programmable gate array (FPGA) chip mainly completes the distribution of pulse, with the protection etc. of digital signal processor (DSP) exchanges data and system.
The FF650R17IE4 pattern block that described insulated gate bipolar transistor (IGBT) adopts company of Infineon to produce.The AV100-2000 voltage sensor that described voltage sensor adopts LEM company to produce; The LT508-S6 type current sensor that described current sensor adopts LEM company to produce.The TMS320F28335 cake core that described digital signal processor (DSP) adopts Texas Instruments to produce.The ProASIC3A3P250 cake core that described field programmable gate array (FPGA) chip adopts Ai Te company to produce.
Fig. 4 represents that the utility model sends capacitive reactive power experimental waveform, mining reactive-load compensator end line voltage waveform 9 exports five level waveforms, mining reactive-load compensator output current wave 11 is similar to sine wave, and advanced grid line voltage waveform 10 60 degree, send capacitive reactive power.
Fig. 5 represents that the utility model sends perceptual idle experimental waveform, mining reactive-load compensator end line voltage waveform 9 exports five level waveforms, mining reactive-load compensator output current wave 11 is similar to sine wave, and falls behind grid line voltage waveform 10 1 hundred 20 degree, sends lagging reactive power.
Fig. 6 represents that the utility model is switched to sends perceptual idle dynamic experimental waveform from sending capacitive reactive power, reactive current reference value is-150A (sending lagging reactive power) by 150A (sending capacitive reactive power) step, the step response of mining reactive-load compensator output current wave is very rapid, and the response time is shorter than 10ms.
The utility model can produce capacitive reactive power neatly based on the new type mining reactive-load compensator of modularization three-level structure, also perception can be produced idle, capacitive reactive power is idle to perception, otherwise or, can fast tunable continuously, and the function of active power filtering can be realized, be a kind of novel mining reactive-load compensator, have important application value to mine particular electrical netting gear.
Above specific embodiment of the utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present utility model.
Claims (8)
1. the new type mining reactive-load compensator based on modularization three-level structure, it is characterized in that, comprise interconnective main loop unit and control unit, main loop unit comprises the input reactance device, phase shifting transformer and the three level power conversion unit that connect successively, and control unit comprises control signal collecting unit, control algolithm realizes unit, control signal issue unit.
2. the new type mining reactive-load compensator based on modularization three-level structure according to claim 1, is characterized in that, described three level power conversion unit is made up of insulated gate bipolar transistor and capacitor.
3. the new type mining reactive-load compensator based on modularization three-level structure according to claim 1, is characterized in that, described control signal collecting unit is made up of interconnective voltage sensor and current sensor.
4. the new type mining reactive-load compensator based on modularization three-level structure according to claim 3, is characterized in that, the AV100-2000 voltage sensor that described voltage sensor adopts LEM company to produce; The LT508-S6 type current sensor that described current sensor adopts LEM company to produce.
5. the new type mining reactive-load compensator based on modularization three-level structure according to claim 1, is characterized in that, it is digital signal processor that described control algolithm realizes unit.
6. the new type mining reactive-load compensator based on modularization three-level structure according to claim 5, is characterized in that, the TMS320F28335 cake core that described digital signal processor adopts Texas Instruments to produce.
7. the new type mining reactive-load compensator based on modularization three-level structure according to claim 1, is characterized in that, described control signal issue unit is field programmable gate array chip.
8. the new type mining reactive-load compensator based on modularization three-level structure according to claim 7, is characterized in that, the ProASIC3A3P250 cake core that described field programmable gate array chip adopts Ai Te company to produce.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743104A (en) * | 2016-04-25 | 2016-07-06 | 哈尔滨理工大学 | Controller and control method for reactive compensation and low-order harmonic current suppression of power grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743104A (en) * | 2016-04-25 | 2016-07-06 | 哈尔滨理工大学 | Controller and control method for reactive compensation and low-order harmonic current suppression of power grid |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20170814 |
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| CF01 | Termination of patent right due to non-payment of annual fee |